Glasses with modified young's modulus profile
AssigneeCorning Incorporated
InventorsTimothy Michael Gross, Adam Robert Sarafian, Jingshi Wu, Zheming Zheng
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Abstract
Glass-based articles that include a reduced Young's modulus layer extending from a surface of the glass-based article to a depth of layer and an optional compressive stress layer extending from a surface of the glass-based article to a depth of compression are formed by exposing glass-based substrates to water vapor containing environments. The methods of forming the glass-based articles may include elevated pressures and/or multiple exposures to water vapor containing environments. The glass-based articles may be utilized in foldable or flexible electronic devices.
Claims20
A glass-based article, comprising:
- a reduced Young's modulus layer extending from a surface of the glass-based article to a depth of layer;
- a hydrogen-containing layer extending from the surface of the glass-based article to a hydrogen depth of layer, wherein a hydrogen concentration of the hydrogen-containing layer decreases from a maximum hydrogen concentration to the hydrogen depth of layer;
- and
- a compressive stress layer from hydrogen species extending from a surface of the glass-based article to a depth of compression,
- wherein:
- the compressive stress layer comprises a compressive stress greater than or equal to 10 MPa, and the reduced Young's modulus layer comprises a Young's modulus at a depth of 500 nm from the surface that is less than a bulk Young's modulus of a glass having a composition equivalent to the composition at the center of the glass-based article;
- and
- the center of the glass-based article comprises greater than or equal to 10 mol % and less than or equal to 23 mol % K2O and greater than or equal to 2 mol % and less than or equal to 15 mol % P2O5.
A glass-based article, comprising:
- a reduced Young's modulus layer extending from a surface of the glass-based article to a depth of layer;
- a hydrogen-containing layer extending from the surface of the glass-based article to a hydrogen depth of layer, wherein a hydrogen concentration of the hydrogen-containing layer decreases from a maximum hydrogen concentration to the hydrogen depth of layer;
- and
- a compressive stress layer from hydrogen species extending from a surface of the glass-based article to a depth of compression,
- wherein:
- the compressive stress layer comprises a compressive stress greater than or equal to 100 MPa;
- and
- the center of the glass-based article comprises greater than or equal to 5 mol % and less than or equal to 23 mol % K2O and greater than or equal to 2 mol % and less than or equal to 15 mol % P2O5.
Dependencies are inferred from the claim text.